This review has been a long time in the coming:
In 2003 I flew to London from Denver with three of my friends - NONE of our bags arrived with us. No big deal you say, because they'll 'be on the next flight' ----- but then they weren't, nor the next, nor the next.
Several days later we decided to move on, so we went to Spain but kept checking with US Airways. Communication was always difficult and never fruitful. Long story short, we spent about a month on the continent and OUR BAGS NEVER SHOWED UP!!! They were eventually returned to us in Denver, in terrible shape, of course.
I didn't fly with these guys for years after that but recently decided to give them another (their last) shot; my flight was rerouted, delayed about six hours and then I was forced to spend the night in another city (not my destination) because all connections had left. This was not during any sort of peak travel time. In short, another abysmal failure.
***Bottom line:*** US Airways' service is as awful as can be. I wouldn't fly them for free. Choose any other airline over these incompetent clowns.